Storage-battery grease-sealing nut



May 21, 1929.

w. E.- DUNN 1,714,467

STORAGE BA TTERY GREASE SEALING NUT Filed Aug. 2 5, 1923 //VVE/V7'0/? WITNESS.

h/J/km-LE. Dunn 4770/P/VEY Patented May 21 1929.

UNITED STATES WILLIAM E. DUNN, OF WILMETTE, ILLINOIS, ASSIGNOR TO THE ELECTRIC STORAGE- PATENT OFFICE.

BATTERY COMPANY, OF PHILADELPHIA, PENNSYLVANIA, A CORPORATION OF NEW JERSEY.

STORAGE-BATTERY GREASE-SEALING N UT.

Application filed August 23, 1923. Serial No. 658,884.

The principal object of the present invention is to prevent or oppose corrosion of storage battery connectors and terminals and parts thereof such as is due to the action of a film of acid or electrolyte if allowed to form or creep on the surface of the parts. Another object of the invention is to provide for conveniently and comparatively inexpensively applying and retainin at the terminalpost a supply of grease use ul inefiecting the object first mentioned. 1 P

Other objects ofthe-invent-ion will appear from'the following descri tion at the end of which the invention will e claimed and in which reference will be made'to the accompanying drawing-which is a view partly in elevation and partly in section illuttrating features of the invention.

-'a.' Therimo In the drawings 1 is a storage battery grease sealing nut as of lead alloy and there is formed through it a funnelform opening'of which the stem part 2 is threaded and of which the other part 3 provides with the ter- I minal post 4 a rease cavity containing grease E the part 3 of the funnelform opening is spaced inward from the rim of the nut andthe part 3 is shown as spherical in forln. I I

In use the nut I is screwed onto the threaded portion of the terminal post 4 and it serve to old the rubber jarcover 5 and the in-,

sulating washer 6 onto a seat 7 provided on the 0st. The grease 0 remains inplace and performs itsfunction of opposing corrosive action by preventing the formation of a coating or fihn of electrolyte or acid. It will of course be understood that a connectoris applied to the post 4 at. its-upper end but connectors are too well'u-nderstood to require further description or illustration.

There is a marked advantage in having the grease cavity 3 combined with the seal nut rather than to use a separate grease retaining device which would involve another part to manufacture and appl When the intercell connector 6, is in p ace on the top of the post, it forms a cover over the grease cavity to prevent the collection of dirt and acid on the surface of the grease.

I claim: I

1. A storage battery grease sealing nut having through it a funnelform openin of which the stem is screw threadedan of which the other part provides with the terminal post a grease cavity. h

2. A storage battery grease sealing nut having through it and spaced inward from its rim a funnelform openin of which the with a battery terminalpost. and of which the other part is spherical to provide with the post a grease cavity.

stem part is screw threaded or engagement post and clamp the cover down onto the shoulder of the post, and said nut having an upwardly projecting rim spaced from the post to form a grease retaining cavity.

4. In a storage battery the combination of a terminal post havin a seat, a cover, a screw threaded nut mounte on the post and clamp mg the cover, a grease cavity provided 1n part by the post andin part by the upwardly I projecting rim forming part of the nut, and grease arranged in the cavity and in contact with the post IYWILLIAM E. DUNN. 

